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Table 2 Acceleration-based values from the Si-St and T-St-Si phases (N = 30)

From: Differences in trunk accelerometry between frail and non-frail elderly persons in functional tasks

  Frail (n = 14) Non-frail (n = 16) U d p-Value
  Median (IQR) Median (IQR)    
Si-St
t.stopwatch (s) 7.03 (5.14 / 10.88) 2.23 (2.01 / 2.49) 13.00 1.255 <0.001
x.acc.max (m/s2) 2.11 (1.64 / 2.41) 3.43 (2.06 / 4.03) 49.50 -1.149 0.009
x.acc.min (m/s2) -1.08 (-1.88 / -0.69) -2.94 (-3.81 / -2.06) 30.50 -3.801 <0.001
y.acc.max (m/s2) 2.89 (1.94 / 3.87) 6.09 (4.87 / 7.04) 15.00 -1.972 <0.001
y.acc.min (m/s2) -1.47 (-2.35 / -0.59) -6.29 (-7.88 / -3.55) 0.000 2.622 <0.001
y.acc.mean (m/s2) 0.47 (0.31 / 0.94) 0.01 (-0.39 / 0.48) 45.00 1.069 0.005
rv.acc.max ( m/s2) 6.41 (5.43 / 8.31) 8.49 (7.56 / 10.78) 58.00 -0.803 0.025
rv.acc.mean ( m/s2) 2.71 (2.11 / 3.64) 4.12 (3.67 / 4.89) 44.00 -1.222 0.005
T-St-Si
t.stopwatch (s) 10.42 (7.64 / 14.52) 3.71 (2.88 / 4.01) 2.00 1.966 <0.001
y.acc.max (m/s2) 3.13 (2.23 / 3.92) 6.03 (5.01 / 7.68) 26.50 -1.389 <0.001
y.acc.min (m/s2) -2.69 (-4.17 / -0.96) -8.49 (-12.1 / -5.23) 14.00 1.723 <0.001
z.acc.max (m/s2) 5.94 (4.32 / 7.31) 2.45 (1.96 / 5.89) 62.00 0.818 0.038
z.acc.min (m/s2) -2.99 (-6.13 / -2.52) -6.88 (-8.51 / -4.34) 35.00 1.329 <0.001
z.acc.mean (m/s2) 0.57 (-0.12 / 2.28) -1.44 (-3.34 / -0.16) 36.00 1.473 0.002
rv.acc.max ( m/s2) 7.11 (5.22 / 7.72) 10.65 (7.91 / 12.38) 41.00 -1.120 0.003
rv.acc.min ( m/s2) 0.28 (0.19 / 0.47) 0.71 (0.49 / 1.01) 38.00 -1.157 0.002
rv.acc.mean ( m/s2) 3.03 (2.73 / 3.81) 4.39 (3.24 / 5.27) 45.00 -1.202 0.005
  1. x, x axis; y, y axis; z, z axis; acc, acceleration; t, time; max, maximum; min, minimum; rv, resultant vector; U, U-Mann–Whitney; Si-St, Sit to Stand; T-St-Si, Turn Stand to Sit; d, Cohen’s d; IQR, interquartil range (percentil 25% / percentil 75%).